I emulated a Pokemon Colosseum iso file today and started playing it, but the audio really sucks...

It can run at the 45-60fps and 100% speed, but there are many missing instruments from the audio and some random chirps. I am using the Dolphin emulator, and have no other problems besides the audio.

What should I try to get the audio working.
(and FYI I have SSBM, too and the audio works great)